Apparatus for sizing or grading materials.



R. W. DULL. APPARATUS FOR SIZING 0R GRADING MATERIALS.

APPLICATION FILED MAY 26. 1911.

Patented Apr. 8, 1913.

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R. W. DU LL. A APPARATUS FOR SIZING 0R GRADING MAIERIA APPLIUATION FILED MAY 26, 1911.

Patented Apr. 8, 1913.

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veyer belt B fr (UNITED STATES PATENT OFFICE.

RAYMOND W. DULL, OF AURORA, ILLINOIS.

- APPARATUS FOR SIZING OR GRADING MATERIALS.

To all whom it may concern:

Be it known that I, RAYMOND DULL, a citizen of the United States of America, and resident of Aurora, have invented a certain new and useful Improvement in Apparatus for Sizing or Grading Materials, of which the following is a specification. I

My invention relates. to apparatus for sizing or grading materials of different kinds, such for example as crushed rock, coal or ore, and for accumulating the difi'erent sizes or grades in separate piles or bins.

The object of my invention is to provide an apparatus for this purpose in which provision is made for extendin the size or growth of each tal direction, w pile or bin will not depend upon the vertical height thereof, as was heretofore the case in the use of apparatus of this kind, and whereby the properly sized or graded materials may be discharged at an suitable or desired point along the length 0 thesaid apparatus, each size or grade being accumulated in a pile which is separate from the others. I

To these and other useful ends, my invention consists in matters hereinafter set forth and claimed.

In the accompanying drawings-Figure 1 is a side elevation of a sizing or grading apparatus embodying the principles of my invention. Fig. 2 is an enlarged side elevation of one of the so-called trippers shown in Fig. 1, certain portions thereof being broken away for convenience Fig. 3 is an end elevation of the tripper or machine shown in Fig. 2. Fig. 4 is a section on line H in Fig. 2. Fig. 5 is a section on line 5-5 in Fig. 2.

As thus illustrated, my invention comprises a stationary ,frame or superstructure A upon which is mounted a track a. A conis also mounted on the said ame or superstructure, being arranged to travel on rollers b, the upper horizontal portion of the belt traveling in the direction indicated by the arrow, and the two ends of this endless belt being arranged upon rolls and driven in any suitable or desired manner. The co-called trippers C and C are provided with car wheels 0 that travel on the said track a, whereby the said trippers can be moved back and forth along the track to trip the load off the belt, thereof, and discharge the Specification of Letters Patent. Application filed Kay 26, 1911.

Kane county, Illinois,

ile of materia in a horizonereby the capacity of each of illustration.

spout (1 same at any desurface of the belt B. These materials thus Patented Apr. 8, 1913. Serial No. 629,585.

sired point in the length of the apparatus. Asthe two trippers are exactly al1ke, a description of one will be sufiicient for both.

Referring, therefore, to Figs. 2150 5, inclusive, it will be seen that the tripper C he upper portion thereof. The said frame is provided with an upper roll 0 and a lower roll 0*, the belt B traveling first up the incline c, then over the roll 0 then downwardly and under the roll a", and then forward upon the rolls 6 of the frame or superstructure A. Thus any material carried on the therefrom at the timethat it travels over the The materials thus discharged are ward and dlscharge through the spouts d at each side of the tripper. pact of the materials is sustained by an accumulation of such materials upon the plate d in the upper portion of the hopper. The said materials'are then distributed over the surface of the screen by the are a-rrangedin stepped relation, there bei wo series or rows of these plates, and the arrangement being such' 'that the materials are forced to travel between the plates, each plates (Z which;

belt is discharged The initial im'- plate thereby deflecting a certain proportlon 1 of th plates are adjustable edgewise, in a direction transverse of their length, and in a direction crosswise of the conveyer belt B, whereby materials downward and over the screen d may be regulated at will. In this way the materials are evenly distributed over the surface of said screen, each plate forming an accumulation of the materials to protect itself against wear by abrasion. A second set of plates 61 is arranged below the plates (i instraight rows, but with the members of spaces between the movement. These plates d may also be adjustable edgewise, and in a direction crosswise of the tripper, whereby the action of these plates may be properly adjusted or regulated. Anything that drops through the said screen is caught by the hopper or and thereby returned to the upper 'e mam stream of materials. Theser of opening of "dent to crushing or grin returned to the belt then travel onward to the next tripper, or to the final pointof discharge at the end of the belt, as the case may be. Suppose, for example, that the mesh or size of the opening in the said screen is of such character that everything except the coarsest portions of the material is allowed to pass through and fall into the hopper (Z and then back upon the belt. such case the said relatively coarse portion of the materials will stay in the hopper D and travel downwardly over the screen (I, and finally escape through the lateral spout d, being then allowed to fall upon the 'round at the base of the frame or super- A. All other portions of the said materials then travel onward on the belt to the next tripper, where they are again subjected to another sizing or grading operation, or to the point of final discharge at the end of the belt, as the case may be. The said trippers are, as previously explained, exactly alike, except that the mesh or size the screen of each tripper is from that of the screens structure necessarily difierent of all other trippers veyer belt. As stated, .the screen of the first tripper to receive the materials may be of wide or coarse mesh, to produce the efiect described, whereby the extremely coarse materials will be eliminated first, thus saving wear and tear on the apparatus, and reserving the thinner materials, which in some cases may be the impalpable powder inciding operations, for thermal discharge. Or, on the other hand, the method of sizing or grading can be reversed, as by arranging the trippers so that the one having the finer mesh screen will, receive the materials first, thus passing the materials from one tripper to another until the coarsest portions thereof are finally discharged by the last tripper, or at the end of the belt. \Vith this method, of course, the arrangement of the spouts d and d is necessarily the reverse of that shown-that is to say, the materials passing through the screen are discharged laterally at the sides of the tripper, while the materials which do not pass through the screen are delivered back on to the belt or conveyer B Either method may be employed, without departing from the spirit of my invention, although it will be found, as previously stated, that the elimination of the coarsest portions of the materials first has some advantage, as in this way the apparatus is saved considerable wear and tear. 1y an arrangement of this kind, it will be seen that the discharge of the different sizes or grades of materials is not limited to fixed points, as is the case, for example, with a rotary screen, the use of trippers permitting each particular size or grade of material to be discharged at various points in the length in the path of the con-' ing mixed with the others. possible length, where of the track upon which movable back and forth, whereby each pile of material may be increased or caused to grow horizontally. In this way the capacity of any bins employed for the diiterent sizes or grades of material may be increased to any size without the necessity of building them up vertically to an undesirable and inconvenient height, which latter is the case when rotary screens or other like sizing an grading devices are employed. With my improved arrangement a large quantity of each size or 'rade of material may be carried in piles or bins, regardless of the height of the apparatus, as bins which are long and low can be filled by gradually moving the trippers along---that is to say, by causing each tripper to move from one en other of its allotted bin. As a matter of fact, however, and as will be seen, it is not necessary to employ bins in connection with the arrangement shown, and this is one of the advantages of my invention.

With the. arrangement shown, involving the use of trippers provided with screens of difierent mesh or size of openings, the different sizes or grades of material can be dumped in the open and accumulated in piles which are widely separated that is to say, which are separated to the extent that each pile will have ample room in which to grow without encroaching upon or becom- In this way it is to build a track of considerable the materials are to be used and-to discharge the difierent sizes or grades exactly at the points where they are to be used. This is quite different, of course, from the practice when the rotary screen is employed, or other paratus, as in such case the ditlerent sizes or grades of materials are points.

stationary screening apdischarged at fixed Moreover, and with my improved sizing and grading apparatus, the different sizes and grades can be mixed or combined in any desired manner. This can be done, for example, by causing a tripper to discharge the coarse portions of the materials into a certain bin to the desired and necessary extent, and by then causing another trip er to move along and add thereto a suitable quantity of a finer grade or smaller size of materials.

There are various other uses and modes of operation which are possible with my improved apparatus, which are obvious, and which are impossible, or at least inconven ient, with the apparatus heretofore employed in the sizing and grading of materials.

What I claim as my invention is: 1. Apparatus for sizing and grading material, comprising a conveyer belt arranged to travel horizontally, adapt d to support the material thereon, and a plurality of the trippers are p d to the the material thereon,

- trippers disposed in yeyer belt, means for the path of travel of successively intercept each tripper being sizing mechanism, the

sai belt,,adapted to provided with a mechanism of each tripper comprising a' screen, and the screens of said trippers be} ing of different character, each tripper be ing movable to intercept the load at differ-v ent points in the length of said belt.

2. Apparatus for sizing and grading ma terial, comprising a conveyer' for the material, and a tripper inlthe path of said conveyer, adjustable along the length thereof, said tripper being provided with a sizing mechanism for dividing ,the material into two parts, means for preventing one of said parts from returning'to the conveyer, and means for returning the other part tov the conveyer, whereby I only a portion of the material from the belt.

3. Apparatus for sizing and grading material, comprising an endless traveling con supporting said belt a in a horizontal position, said belt being adapted to carry the material on the upper surface thereof, and

I p a tripper disposed in the path of travel of provided with a screening mechanism for separating out of the bulk of the material a certain predetermined size or grade thereof, permitting the ungraded portions of the material to return to the conveyor belt, and means for preventing the said separated size or 'grade from returning to said belt, Whereby the tripper unloads only a portion of the material from thelbelt, v v

' PP i Hj ;fQr-;sizing and gradi j terial,

comprising an; inclined gravity screen, and a distributing mechanism comprising a. plurality of'inclined plates ar- 'ing mechanism .on said --nism comprising for separating out of the bulk of the matethe tripper unloadsv said belt, adjustable along thelength thereof, said tripper being a ranged in stepped relation along the surface of said screen, whereby the said plates act on the material moving along the said screen, each plate beingdisposed at an anglewith one edge engaging. -thesurfa'ce thereof.

to said screen, and

v Apparatus for'sizing and grading material, comprising a traveling conveyer, a

tripperin the path of said conveyer, adjustableeal' ng the length thereof, and ascreen tripper, said mechaan inclined gravity screen rial acertain predetermined size or thereof,-permitti11g the remainder to onward with the said' said the material from the belt.

6. A belt conveyor, and a tripper therefor, adjustable along the length thereof, said grade travel conveyer, whereby tr pper being operative to remove only certam size portions of the load from said belt.

' 7. A belt conveyer, and a tripper therefor, adjust-able along the length thereof, said tripper being operative to remove only certainportions .of the load from said belt, and

having-a screen whereby the load is divided.

'8. A belt conveyer, and a tripper therefor, adjustable along the length thereof, said tripper being operative .to remove only certain portions of the load from said belt, and having a screen that intercepts the entire load and returns only a portion thereof to the belt.

Signed by me at Chicago, Illinois, this 19thday of May, 1911.

I RAYMOND W. DULL. Witnesses: I

ELLEN H. OLEoo,

S. LEWIS.

-trip'pe'r unloads only a certain size of I 

